Patents by Inventor Bruce L. Ramsey

Bruce L. Ramsey has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Poly(phenylene sulfide) composition and articles having improved thermal stability at high temperatures
    Patent number: 5149749
    Abstract: A polymer composition having improved thermal stability at high temperatures. The composition comprises a poly(phenylene sulfide) base resin and a thermal stabilizer selected from the group consisting of polyethersulfone and polyamide-imide, the thermal stabilizer being present in the composition in an amount sufficient to improve the thermal stability of the composition at a temperature of at least 150.degree. C. A method of improving the thermal stability of a poly(phenylene sulfide) resin and articles produced therefrom at high temperatures and an article having improved thermal stability at high temperatures are also provided.
    Type: Grant
    Filed: May 31, 1990
    Date of Patent: September 22, 1992
    Assignee: Phillips Petroleum Company
    Inventors: Jennings P. Blackwell, deceased, Bruce L. Ramsey
  • Treatment of arylene sulfide polymer fiber
    Patent number: 4923971
    Abstract: Improved, stronger poly(arylene sulfide) fibers can be produced by treatment of a crystallizable poly(arylene sulfide) fiber with an organic halide, either before or after annealing. Physical properties, such as density and abrasion resistance, can be increased after said treatment.
    Type: Grant
    Filed: November 17, 1988
    Date of Patent: May 8, 1990
    Assignee: Phillips Petroleum Company
    Inventor: Bruce L. Ramsey